Grinder



L. QUARLES.

GRINDER.

APPLICATION FILED JAN. 6. 1922.

L425 286, n e Aug. 8, 19222,

* 'NVEN TOR.

A TTORNEY.

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LQ'UIS QUARLES, 0F MILWAUKEE, WISCONSIN.

GRINDER.

Application filed January 6, 1922.

T 0 all whom it may concern:

Be it known that I, LoUIs QUARLES, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented certain new and useful Improvements in Grinders, of which the following is a specification, reference being bad to the accompanying drawings, forming a part thereof.

The invention relates to grinders and more particularly to the head construction thereof.

In grinders it is customary in many instances to mount the grinding wheel or wheels on a head which may be turned at different angles to suit the requirements of the work, and when turned the head is secured in adjusted position in various ways but principally by means of a set screw or split sleeve and clamping nut. which in practice has not been found to be very effective. I have discovered that locking means dependent on frictional engagement such as set screws. etc. are inefficient and in many cases dangerous, as they are apt to be loosened by the pressure and jarring. thus permitting the grinder head to rotate under the pressure of the grinding. disturbing the work and even injuring the operator. Furthermore this type of engagement is subject to wear and does not afford a positive lock, particularly after the parts become worn.

The principal object of my invention is to provide a grinder head which cooperates with a relatively fixed standard by means of an interlocking connection therewith whereby the angular adjustment of the head may be readily and quickly accomplished, without the use of tools and afford a safe and unyielding lock and one which is not affected by jarring, pressure or wear.

With this and other objects in view the invention consists in the device hereinafter described and all equivalents. In the drawings: Fig. 1 is a view partly in section of a grinder embodying the invention: Fig. 2 is a section taken on the line Q2 of Fig. 1: Fig. 3 is a detail sectional view taken on the line 2-l-3 of Fig. 1; Fig. 4 is a detail elevation view of the adjustable connection between the grinder head and standard.

In the drawings. the numeral 5 designates a fixed support in the form of a tubular standard through which a drive shaft 6 ex- Specification of Letters Patent.

Patented Aug. 8, 1922.,

Serial No. 527,292.

tends. driven by foot or other power in any suitable manner. The shaft 6 is slidably but non-rotatably connected to another shaft 7 preferably by providing a square or polygonal socket 8 in the upper end of the shaft 6 in which a similarly shaped lower end of the shaft 7 is slidably mounted. The shaft 7 is also adapted to be retained against free sliding movement in a raised or lowered position with respect to the shaft 6 by means of a ball 9 mounted in a transverse recess 10 in the shaft 7 and urged by a spring 11 into either a lower recess formed by a hole 12 or an upper recess formed by a hole 13. said holes being of smaller diameter than the ball.

The grinder head casing 14 has a tubular guide sleeve 15 suitably secured thereto and fitting the inner bore 5 of the standard 5 so as to maintain the casing and standard in alignment. A bearing 16 for the shaft 7 is mounted between the top of said sleeve and the hub of a bevel gear 17 disposed within the casing 14. The casing 14 has tubular extensions and a transverse grinder shaft 18. journalled in suitable bearings 19, only one being shown. passes through said extensions and is provided with the usual collars 20 and nut 21 for attaching a grinder wheel 22 thereto. This shaft 18 carries a bevel gear 23 which meshes with the gear 17 so that rotation of the shafts 6 and 7 is transmitted to the grinder or tool shaft 18. A removable cover plate 24 for an opening 25 in the casing 14 is secured to said casing by screws 26 or other suitable means and is provided for purposes of assembly. oiling and inspection.

In some classes of work in which these devices are employed it is desirable to turn the casing 14 so that the grinding wheel may assume different positions with respect to the work and to hold the casing in the desired adjusted position. For this purpose I have provided in combination with the sliding shaft connections previously described an interlocking connection between the casing 14 and the standard 5. This interlocking connection preferably consists of a depending flange 27 on the casing having radial slots or recesses 28 milled or otherwise formed therein and in turn forming depending teeth 29 and a laterally extending flange 30 on the standard having radial recesses or slots 31 milled or otherwise formed therein and in turn forming laterally extending teeth 32, these parts being so proportioned that the teeth 32 fit into the siots 28 and the teeth 29 into the slots 31. With such a connection itis apparent that by lifting the grinder head including the casing and the shaft 7 connected therewith upwardly to a. position in which the flanges 27 and 30 are separated as shown in Fig. 4 the head may be rotated to bring the wheel 22 to the desired angular position with respect to the work and on lowering the head it is brought into interlocking engagement with the standard and so locked against rotation. It is obvious that during adjustment the shaft 7 may be moved longitudinally of the shaft 6 and the ball 9 cooperating with the inner ends of the openings 12 and 13 aids in holding the parts against freely sliding movement in either a raised or lowered position.

If desired the guide sleeve 15 can be dispensed with, the head being kept in alignment during rotation by the operator, and in such case the threaded upper part is retained and operates only as a lock nut and not as a swivel; or. if preferred, the bearing l6 and the two-piece sliding connection between the shafts (3 and 7 can also be omitted, so that when the grinder head is ,raised the bevel gear 23 is raised relatively to thebevel gear 17. which retains itsiposition, and they are out of mesh while the grinder head is being turned. In such case, however, it is necessary to see that they are in mesh when the grinder head is lowered into its operative position.

From the above description it will be noted that the angular adjustment of the head may be easily and speedily accomplished and that the interlocking connection between the head and its standard provides a positive lock to prevent movement from a predetermined adjusted position.

I desire it to be understood that this inventionis not to be limited to any specific form or arrangement of parts except in so far as such limitations are specified in the claims.

I claim:

1. In a grinder, the combination of a standard a grinder head including a housing and grinder shaft, a drive shaft operatively connected to said grinder shaft, interlocking connection elements on said housing and standard engaged and disengaged by a longitudinal movement of the one relatively to the other to vary the angular position of said grinder head and positively looking the same against rotation.

2. In a grinder. the combination of a standard, a grinder head including a housing and a grinder shaft. and a drive shaft operatively connected to said grinder shaft, said standard having a toothed flange and said housing having a toothed flange adapted to register with the toothed flange of said housing when rotated to different positions whereby the angular position of said grinder shaft may be varied. i

3. In a grinder, the combination with a standard and a grinder head including a housing and a grinder shaft, of a two part drive shaft, one part of said drive shaft being 'arried by the head and operatively connected to said grinder shaft and slid-ably connected to the other part of said drive shaft, means for securing the parts of said drive shaft against longltiulinal movement. and an interlocking connection between said standard and housing for varying the position of said grinder shaft.

i. In a grinder, the combination. with a standard and a grinder head including a housing and a grinder shaft. of a two part drive shaft. one part of said drive shaft being carried by the head and operatively connected to said grinder shaft and slidably connected to theother part of said drive shaft, an adjustable interlocking connection between said housing and standard and means,

for preventing vertical movement of the head when in an adjusted position.

'5. In a grinder, the combination with a standard, a grinder head including a housing and a grinder shaft. of a two part drive shaft, one part of said drive shaft being carried by the head and operatively connected to said grinder shaft and slidably connected to the other part of said shaft, an adjustable connection between said housing and standard, and means for holding the head in either a raised freely rotatable position or in a lowered adjustable position.

6. In a grinder. the combination. of a standard, a grinder head including a housing and a grinder shaft. a disconnectable toothed connection between said standard and housing permitting said housing to be raised free of said standard and rotated to the desired position and then lowered to engaged position with the standard. and drive means operatively connected to said grinder shaft and permitting the adjustment of the head without disconnection from said grinder shaft.

LOUIS QUARLES. 

